Hi Marie,
I controlled my diabetes for the first 5 years with just diet and exercise. I wasn't heavy to begin with and I think walking was the best thing I ever could do formyself with this.
However, last year my arthritis got so bad I really can not walk now and BS went up and unfortunately had to get on the meds I hate so much.
It can be done, but I think exercise is the biggest helper and of course changing your eating habits . Good luck with the book.
Sandy